HP EliteDesk 705 G3 Desktop Mini Maintenance And Service Manual page 94

Network controller stopped working when an expansion board was added to the computer.
Cause
The network controller requires drivers.
Network controller stops working without apparent cause.
Cause
The files containing the network drivers are corrupted.
The cable is not securely connected.
The network controller is defective.
New network card will not boot.
Cause
New network card may be defective or may not meet industry-
standard specifications.
Cannot connect to network server when attempting Remote System Installation.
Cause
The network controller is not configured properly.
System setup utility reports unprogrammed EEPROM.
Cause
Unprogrammed EEPROM.
86 Chapter 6 Troubleshooting without diagnostics
Solution
Verify that the drivers were not accidentally deleted when the
drivers for a new expansion board were installed.
Solution
Reinstall the network drivers using the Recovery Disc Set in
Windows 7.
If necessary, download the softpaq from the web (from a different
computer).
Ensure that the cable is securely attached to the network
connector and that the other end of the cable is securely attached
to the correct device.
Contact an authorized service provider.
Solution
Install a working, industry-standard NIC, or change the boot
sequence to boot from another source.
Solution
Verify Network Connectivity, that a DHCP Server is present, and
that the Remote System Installation Server contains the NIC
drivers for your NIC.
Solution
Contact an authorized service provider.